Android Studio 3.1 Beta 4 is now available in the Canary, Dev, and Beta channels.
This update includes fixes for the following public issues:
- Issue#72752164: Android Studio 3.1 creates native libraries twice as big as 3.0!
- Issue#70937387: AS Build: 3.1 Canary 6 kills the "Key Password".
If you already have an Android Studio build on the Canary or Dev channel, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can download here.